Typewriter desk attachment



Nov. 15, 1932. l. FRANKEL 1,888,034

.TYPEWRITER DESK ATTACHMENT Filed June 21, 1928 4 Sheets-Sheet 1 7 II @11 Hing Nov. 15, 1932. 1. FRANKEL 1,888,034

TYPEWRITER DESK ATTACHMENT Filed June 21, 1928 4 Sheets-Sheet 2 Nov. 15, 1932, FRANKEL 1,888,034

TYPEWRITER DESK ATTACHMENT Filed June21, 1928 4 Sheets-Sheet 3 1721/972 for:

Badore Frankel,

Patented Nov. 15, 1932 UNITED ISADOBE FRANKEL, OF CHICAGO, ILLINOIS. ASSIGNOR T0 COMMERCLAL FURNITUIPE COMPANYQOF CHICAGO, ILLINOIS, A oonronATIoN'onILLIngIs TnnwmTna DESI; ATTACHMENT A pplieation flled June. 1928. Serial No. 287,068.

The present invention relates to typewriter desks and more in. particular to a novel construction of attachment and support for a typewriter or other oflice device" adapted jects,' advantages and capabilities 8 later more fully appear.-

My invention further resides in the cornbination construction. and arrangement of parts illustrated in .the accompanying ,dra y vings, and hile I have shown there n a'preferred embodiment; I desire ;it' to be understood that the same is susceptible ofmodification and cha ge without departing from the spirit of m invention. A In'the'drawings: i 1 Fig. 1 is a View in ertical 9195s section through the desk. T Fig. 2 is a View in horizontalcross section taken on'th'e line 2-2 of Fig. 1. f Fig. 3 is a View in vertical cross section similar :tO Figfl, but showing the support ena ler in lower'ed position andabout .to be pushed into the Well of the de'sk. i

Fig. i is a fraginentarylview in Vertical cross" 'section taken vonthe line of Fig' .1. ig, 5 isa fragmentary yiewiin'i eii'tical cross section taken onthe line '5-j5 of Fig.1. Fig. 6 is a fragmentary View "in end elevation of the plate on the front'of the care riag a H Fig. 7 is a fragmentary View in .side elevation of the carrying plate and'retaining "Fig. .8 isa fragmentary View in vertical cross? section of the: door and carriage'jthen the typewriter has been inserted into the Well of th e desk, and the door or'elosurei's .with t n ert e e lcarried thereon.

the Variation of tension as the Fig; 9 is a fragmentary iew in vertical cross section taken'on tlie line 9 9 of 3'. I

"Re e t e d w n ie-num a l igna a de f thered ta yP i which one of the pedestals'2is adapted tio s el i i hou n F ii ypp f i ilf machine or other oflice de'yijce, the t ipey'yrit rm n s a l w d ha ii ll 'y Emad w'i m he h' s ns'for' Well a W ll supported in position for i1 se"'The ft or tablt'3 is adapted to be inserte'd'into or he (We an s so. 'inq in d that the". ithdrav's a'l'or inserti oi iopi-w ime, i Will @flWYIS l mfli i li riT ont'i 156- Sm so m new distur i sthe m ine In order to accomplish such positioning, e s po t or le 3 s meun d'uiibn r hung in the wellupoii a system'of parallel links fl and 5; Whichlinksare pivotally connected by fulcrum'plates 6; securely mount ed upon the side walls 7 and 8"'of the pedestal O 91 h i ks 4 an 5 i a s'dpito 'y q n 0 r y ng P ate 9 Mo nted upon thesecarrying plates aresnpporting rollers 10 adapted to fit intoriiilyvay 111 formed in the grooved edgesfof tlife slipport or tablet 3. means of the construetion 9 h ca yi ipl andithi pivota onnection with the'paraIlel links support l b et m yb swun w and rearwardly' uponfthe links and U b' ckint theheusi gor wel q t 1 .93%. f

l jiiq' t supp rtin l ers Mo' t 'ea the base of h pedest or springs 12." These springs are "connected te heert di gen 30,1 th links 5- T 35 spring count rbal e.t eifiach iie mo nted 19 th ,SHPPOlT tablet f hrol ighout ithe mdvem n o js l t ble ,fr m'itsopen eX- T tended position pedestalor well. ;By,jmeans soft j of the springalt here is a varia I a e of action which approxiniatelyqfi sets c .c a some l gt em shq eawit mdvem h o the links, andlthus tending to aimi'f of ,connterbalancing thro ighout the swing,- a e ejment 9 the i These pliiiii a e pain,

o its osiaejn Within t e arra lelev'er thus prevent the springs 12- from elevating the support and its load within the well or pedestal.

Means are provided for locking the support in its extended position,so as to steady the support and also to prevent its collapse or its being lowered into the well. .Fig. 4 discloses the locking mechanism. Mounted upon the support or table 3v is a block 16 extending substantially the full width of platform or support. Mounted in the rear of the block 16 are smaller blocks 17 and 18.

Mounted in turn upon the blocks 17 and 18 are latches or locking members 19 pivoted at 20 upon a securely mounted arm 21. A movable arm 22 is connected at the lower end of the latch members, which arm 22 is adapted to move the latch members about their pivots. The arm 22 is provided witha; forward extension or member 23 passing through a cut-out portion 24 in the block 16. The operator can, by pressing upon the member 23, disengage the latch members 19 from their normal'locked position. Catches 25 are secured on a cross arm 26 of the desk. These catches are provided with inwardly extending projections 27 adapted to be engaged by the cut-out portion 28in the latches. When the platform or tablet is being raised into its normal extended position for use, the rounded head 29 of the latches engage with the projections, the'rounded head portion gradually riding over the projections and .as the block 16 strikes the under surface of the member 26, the projections snap into the grooves 28 and the support or tablet is then in locked position. A spring 30 attached to the lower portion of one of the latches will normally hold the same in locked position as shown clearly in Fig. 4 of the draw- 1ngs.

- The support or tablet 3, when drawn out 7 in its extended position and during its swinging movement upon the links 4 and 5 is. controlled by a pair. of retaining catches 30? pivotally mounted near the upper edge of the carrying plate 9. A spring31 is connected to the plate 9 and also to a lug 32 mounted on the latch, which-lug is adapted to ride in a slot 33 in the plate 9. The springtends to normally hold the retaining catch in its locked position. and thusprevents the suport or, tablet from being pushed back upon its rollers iii'ti the-pedestal housing or well.

In the downward swing of the links, the catches 30 are released from their locking position by means of a lug 34 mounted upon each catch, which lug projectsa sufficient distance to contact with the link 5 and is raised out of engagement with the end of the platform or tablet to permit the latter to be pushed into the pedestal housing or well. A lug 35 is also mounted on the plate 9 to prevent the plate from-being lowered to any greater depth than shown clearly in Fig. 7 of the drawings; The lugs 34 and 35, both contacting against the link 5, hold the plate in substantially rigid position as the tablet or;vsupport is pushedrinto the well ofthe desk. The lug 34, striking against the link 5,]raises the catch out of its locked position with a plate 36, one of these plates being mounted on each side and to the rear of the support or tablet. The plates 36, are provided with a projection-37 adapted to be engaged by a cut-out portion 38 in the catch 30.

A tie rod 39 is connected to an end 13 of the link 5. This construction greatly facilitates the assembling of the attachment withplate being adapted to fit into grooves 42 in a carriage 43. "The guide plate or runners are substantially centrally mounted upon the plates 15 and in order to maintain the plates at a specified distance apart and to also hold them in substantially rigid position, a tie rod 44 is adapted to bridgethe distance between the plates. This tie rod is provided with reduced ends 45 adapted to be passed through openings in the plate 15, the protruding ends being swedged or hammered so as to prevent displacement 'of the tie rod.

A door 46 for closing the front of the pedestal housing or well, is hingedly connected to the lower front edge of the carrier 43. As the door and carrier are pushed into the well when the typewriter is in use, the upper surface of the door or closure 46 engages against the lower surface of thefguide plates'or runners and prevents the door from being raised into its normal upright position. A spring 47 mounted on the door is adapted to contact with thejlower surface of the car-- riage, the purpose of the springs being to normally urge the .door into its upright and closed position. I

In order to prevent the door 46 and carriage 43 from being pulled out of the well or disengaged from the guide plates or runners, base plates 48 are mounted on the front of the carriage, the base plates being provided with a cutout 49 through which the horizontal portion 41 of the guide plate or runners pass. When the carriage is extended to the front of the housing or well, the base plate 48 will strike against the rounded edge 50 of the guide plates or runners. This construction prevents any further withdrawal of the carrier.

It will be readily seen from the above description that I have provided a novel construction of typewriter desk attachment that is simple in construction and relatively easy to operate. There is very little danger of any of the parts becoming disengaged. The novel construction of the locking mechanism and retaining catches positively hold the support and tablet in position of use and prevent displacement of the machine. The novel construction of attachment allows the machine supported upon the tablet, to be maintained at all times in a horizontal plane and thusprevent any damage to the machine.

Having thus disclosed the invention, I claim:

In a typewriter desk provided with a well adapted to house a typewriter, a movable member for supporting a typewriter, carrying plates including rollers operatively engaging said movable member, arms pivoted to said plates for supporting and for movement of said member from within said well to its operative position, a plate rigidly mounted on opposite sides of said well, auxiliary rollers on said last mentioned plates for engagement with said member when within said well, a latch pivoted to said carrying plates and adapted to positively engage a catch on said movable member for preventing horizontal movement of said member in either direction, and lugs carried by said latch for disengaging the same from said catch when the typewriter and supporting member are forced into the well.

In witness whereof, I hereunto subscribe my name to this specification.

ISADORE FRANKEL. 

